☣️ UN 1868 • CLASS 4
UN 1868 — Decaborane
Placard: Flammable Solid. ERG Guide 134. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
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UN 1868 Quick Details
UN 1868
Product name: Decaborane
DOT Class: 4
Placard type: Flammable Solid
ERG Guide: 134 (check current ERG)
Initial isolation: ERG 134: Initial isolation 50m in all directions. Protective action distance: large spill 150m downwind during day, 300m at night. Evacuate immediate area if fire involves this material.
Common Hazards of UN 1868
- Flammable/combustible material.
- May be ignited by heat, sparks or flames.
- When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
- Corrosives in contact with metals may evolve flammable hydrogen gas.
- Containers may explode when heated.
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe
- Fire will produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
Chemical Identity & Physical Properties
| Also known as | Decaborane(14)Boron hydrideDecaboron tetradecahydrideBoron decahydride |
| CAS Number | 17702-41-9 |
| Appearance | White crystalline solid with a pungent, bitter odor. Exists as colorless to white crystals at room temperature. |
| Flash Point | 70C (158F) |
| Boiling Point | 213C (415F) |
| Vapor Density | 4.2 (heavier than air) |
| Water Reactivity | Hydrolyzes slowly in water, producing hydrogen gas and boric acid. Avoid prolonged contact with water. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1868
Extinguishing Media
Dry chemical, CO2, sand, or dry powder. Alcohol-resistant foam may be used. Water spray for cooling only.
PPE Requirements
⚠️ Level B minimum with SCBA required. Full protective clothing including chemical-resistant suit. Highly toxic by inhalation and skin absorption.
Isolation & Evacuation
ERG 134: Initial isolation 50m in all directions. Protective action distance: large spill 150m downwind during day, 300m at night. Evacuate immediate area if fire involves this material.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 134).
First Actions for a UN 1868 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Stay upwind, uphill and/or upstream.
- Keep unauthorized personnel away.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area for at least 25 meters (75 feet) in all directions.
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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UN 1868 — DecaboraneHAZMAT RADIO NOTE — UN 1868
Product: Decaborane
Class 4 / Flammable Solid / ERG 134
PPE: Level B minimum with SCBA required. Full protective clothing including chemical-resistant suit. Highly toxic by inhalation and skin absorption.
ISOLATION: ERG 134: Initial isolation 50m in all directions. Protective action distance: large spill 150m downwind during day, 300m at night. Evacuate immediate area if fire involves this material.
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 1868 — Decaborane
Class: 4 | Placard: Flammable Solid | ERG Guide: 134
Appearance: White crystalline solid with a pungent, bitter odor. Exists as colorless to white crystals at room temperature.
Water Reactivity: Hydrolyzes slowly in water, producing hydrogen gas and boric acid. Avoid prolonged contact with water.
Extinguishing: Dry chemical, CO2, sand, or dry powder. Alcohol-resistant foam may be used. Water spray for cooling only.
PPE: Level B minimum with SCBA required. Full protective clothing including chemical-resistant suit. Highly toxic by inhalation and skin absorption.
Isolation: ERG 134: Initial isolation 50m in all directions. Protective action distance: large spill 150m downwind during day, 300m at night. Evacuate immediate area if fire involves this material.
— Key Hazards —
• Flammable/combustible material.
• May be ignited by heat, sparks or flames.
• When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Stay upwind, uphill and/or upstream.
• Keep unauthorized personnel away.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/1868 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1868 Decaborane Cls4 ERG134 | ERG 134: Initial isolation 50m in all directions. Protective action distance: la | allfirefighter.com/hazmat/un/1868SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/1868
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Frequently Asked Questions about UN 1868
Flammable/combustible material. May be ignited by heat, sparks or flames. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion Corrosives in contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Stay upwind, uphill and/or upstream. Keep unauthorized personnel away.
Level B minimum with SCBA required. Full protective clothing including chemical-resistant suit. Highly toxic by inhalation and skin absorption.
Water reactivity: Hydrolyzes slowly in water, producing hydrogen gas and boric acid. Avoid prolonged contact with water.. Recommended extinguishing: Dry chemical, CO2, sand, or dry powder. Alcohol-resistant foam may be used. Water spray for cooling only..
ERG Guide 134 recommendation: ERG 134: Initial isolation 50m in all directions. Protective action distance: large spill 150m downwind during day, 300m at night. Evacuate immediate area if fire involves this material.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 134 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles.
This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.